Accession Number : ADD003950

Title :   Cathode Ray Tube Digitizer.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON D C

Personal Author(s) : Parks,John D

Report Date : 25 Jan 1977

Pagination or Media Count : 5

Abstract : A conventional CRT is modified to include a vertical column of electrodes embedded in the face of the CRT. A single valued function is displayed on the CRT and the vertical and horizontal gains are adjusted to produce the desired sweep on the face of the CRT. The horizontal sweep is then disabled and the sweep is compressed to a single axis, coincident with the column of electrodes. The electron beam, corresponding to the plot, generates signals on the electrodes which are encoded to binary outputs. By continually decoding each three consecutive outputs, corresponding points of the plot are determined. (Author)

Descriptors :   *Patents, *Analog to digital converters, *Cathode ray tubes, Colors, Digital computers, Electrodes, Cathode ray tube screens, Coding

Subject Categories : Electrooptical and Optoelectronic Devices
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE